I love kickboxing, but I haven't tried a class at the gym. All I've done is Cathe - LOVE KPC, not crazy about Kick Max.
But last spring, a friend encouraged me to trying spinning (my first gym class ever!) and I am truly addicted! One of my instructors always picks the BEST music and is very motivating.
I wish I could be a runner, but my joints have other ideas.... x(